NGK vs Denso Spark Plugs — Which Is Better?
Head-to-head comparison of NGK and Denso spark plugs. Quality, range, OE applications, and which to choose for your car.
Guides
In-depth component guides
New here? A good place to start is the first car maintenance guide, or pick a job: fitting wipers, changing a bulb or changing your oil.
Best H4 Bulbs UK 2026 — Top 5 Tested & Rated
The best H4 headlight bulbs in the UK for 2026. Performance, long-life, and budget options compared.
How to Change Spark Plugs — DIY Guide
Step-by-step guide to changing spark plugs at home. Tools needed, torque specs, and common mistakes to avoid.
How to Check Engine Oil Level — Step-by-Step Guide
How to check your car’s engine oil level using the dipstick or electronic gauge. When to check, how to read it, and when to top up.
Synthetic vs Mineral Engine Oil — What’s the Difference?
Full synthetic, semi-synthetic, or mineral oil? What the differences are, which your car needs, and whether it’s worth upgrading.
Best Engine Oils UK 2026 — Top 5 Brands Compared
The best engine oils you can buy in the UK in 2026. Castrol, Mobil, Shell, Total, and Fuchs — compared by performance and value.
Engine Oil Change Intervals — How Often in the UK?
How often to change engine oil in the UK. Manufacturer intervals, the effect of driving style, and when to change more frequently.
Engine Oil Viscosity Explained — What Do the Numbers Really Mean?
Engine oil viscosity guide. SAE grades explained, multi-grade oils, viscosity index, temperature charts, why modern cars use thinner oils.
Engine Air Filter Replacement Guide — When & How to Change It
Engine air filter guide. When to replace, how often, DIY replacement steps, performance impact, top brands. Engine vs cabin filters explained.
Standard vs Activated Carbon Cabin Filters — Which Is Better?
Comparing standard particle and activated carbon cabin filters. Performance, cost, and which type is best for you.